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Triage on the tricky bits that need moderator attention would win it for me. Ideally as a moderator I'd like to be picking up an issue with some of the background work done, which would be a massive time saver.
Examples:
Better spam spotting for NAA/VLQ flagged posts.
Again this is a background checking thing: people that use the advanced search options ...

You and Mysticial are both correct - when you cast your delete vote, the question and its max-scored answer were at a total of 20, meaning it required 4 delete votes. Then a downvote occurred and lowered the delete threshold to 3.
I'll just update the /tools display to always show at least 1 vote required, as that's how the mechanic works.

The link to questions (almost) always points to the question, since all deletions are soft deletions. Very rarely is something ever hard deleted.
It's just that often you don't have privileges to see the question as the privilege to see deleted content is only for the OP, moderators, and 10K users. So to answer the unasked part of your question, you ...

The 10k flag queue is gone: Let's get rid of the 10K flag queue
The reason for removing the flag queue was because of its ineffectiveness, clumsy interface and lack of use. Changes to the Low Quality Posts queue (such as NAA flags adding a review to the queue) fulfil the original purpose of the 10k flag queue.
You can still access other parts of the ...

Generally, posters are expected to apply rules laid out in How To Answer guidance:
Provide context for links
...add context around the link so your fellow users will have some idea what it is and why it’s there. Always quote the most relevant part of an important link, in case the target site is unreachable or goes permanently offline.
These rules ...

There is no need to delete it manually. The post is owned by a now-deleted user and has a negative score, so the system will auto-delete it after a while.
In fact, there are two excuses to auto-delete here; closed posts with negative score and no upvoted answers are also auto-deleted if there has been no activity on them for 9 days.
Because it was put on ...

Although closing a question is, effectively, protecting it from being answered by anyone (this is why the protection notice is masked, because it's redundant), protection and closure are two separate concepts; one does not affect the other.
Think of protection and closure as two distinct layers of restriction, with protection being the inner, somewhat ...

It was only put on hold yesterday (29th June 2014).
Unless you have 20k reputation and the question is at a score of -3 or less you have to wait 48 hours before you can vote to delete a question. This is to protect questions that could be improved from being deleted too quickly. This does mean you get situations like this, but the question will be deleted ...

Interesting idea for those of us whose reputation is under 10K, when deleted posts can be seen. At this point, I would think they're still at the early stage of this Meta and want to encourage people to use the site. Still, what you're proposing should be encouraged as a legitimate edit to a question, just as formatting code in this way is encouraged as a ...